/* ===== Base Styles ===== */
:root {
    /* Primary Colors */
    --primary: #3a56e4;
    --primary-dark: #2a46d4; 
    --primary-light: #6a76e4;
    
    /* Secondary Colors */
    --secondary: #ff7846;
    --secondary-dark: #e56836;
    --secondary-light: #ff9866;
    
    /* Neutral Colors */
    --dark: #222831;
    --dark-medium: #393e46;
    --medium: #5c636e;
    --light-medium: #aaaaaa;
    --light: #eeeeee;
    --white: #ffffff;
    
    /* Subject Colors */
    --physics: #4a6cfd;
    --chemistry: #7c3aed;
    --mathematics: #0ea5e9;
    --biology: #22c55e;
    
    /* Font Families */
    --font-heading: 'Poppins', sans-serif;
    --font-body: 'Roboto', sans-serif;
    
    /* Font Sizes */
    --fs-xl: 3rem;
    --fs-lg: 2.5rem;
    --fs-md: 1.8rem;
    --fs-sm: 1.2rem;
    --fs-xs: 1rem;
    --fs-xxs: 0.875rem;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 5rem;
    
    /* Border Radius */
    --border-radius-sm: 4px;
    --border-radius-md: 8px;
    --border-radius-lg: 12px;
    --border-radius-xl: 20px;
    
    /* Transitions */
    --transition-fast: 0.3s ease;
    --transition-medium: 0.5s ease;
    --transition-slow: 0.8s ease;
    
    /* Box Shadows */
    --shadow-sm: 0 2px 5px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 10px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 15px 25px rgba(0, 0, 0, 0.1);
}

/* Reset Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    scrollbar-width: thin;
    scrollbar-color: var(--primary) var(--light);
}

body {
    font-family: var(--font-body);
    color: var(--dark);
    background-color: var(--white);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Scrollbar Styles */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--light);
}

::-webkit-scrollbar-thumb {
    background-color: var(--primary);
    border-radius: 6px;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: var(--spacing-sm);
    color: var(--dark);
}

h1 {
    font-size: var(--fs-xl);
}

h2 {
    font-size: var(--fs-lg);
}

h3 {
    font-size: var(--fs-md);
}

h4 {
    font-size: var(--fs-sm);
}

p {
    margin-bottom: var(--spacing-sm);
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: all var(--transition-fast);
}

a:hover {
    color: var(--primary-dark);
}

ul {
    list-style: none;
}

/* Container */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

/* Section Styles */
section {
    padding: var(--spacing-xl) 0;
}

.section-header {
    text-align: center;
    max-width: 800px;
    margin: 0 auto var(--spacing-lg);
}

.section-header h2 {
    position: relative;
    display: inline-block;
    margin-bottom: var(--spacing-sm);
    padding-bottom: var(--spacing-sm);
}

.section-header h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 3px;
    background-color: var(--primary);
    border-radius: var(--border-radius-sm);
}

.section-header p {
    color: var(--medium);
    font-size: var(--fs-sm);
}

/* Button Styles */
.btn-primary, .btn-secondary, .btn-course, .btn-package, .btn-cta, .btn-submit {
    display: inline-block;
    padding: 12px 28px;
    border-radius: var(--border-radius-md);
    font-family: var(--font-heading);
    font-weight: 500;
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-fast);
    border: none;
    outline: none;
}

.btn-primary {
    background-color: var(--primary);
    color: var(--white);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    background-color: var(--primary-dark);
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
    color: var(--white);
}

.btn-secondary {
    background-color: transparent;
    color: var(--primary);
    border: 2px solid var(--primary);
}

.btn-secondary:hover {
    background-color: var(--primary);
    color: var(--white);
    transform: translateY(-2px);
}

.btn-course {
    background-color: var(--primary);
    color: var(--white);
    padding: 10px 20px;
    width: 100%;
}

.btn-course:hover {
    background-color: var(--primary-dark);
    color: var(--white);
}

.btn-package {
    background-color: #25D366;  /* WhatsApp green */
    color: var(--white);
    padding: 10px 25px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.btn-package:hover {
    background-color: #128C7E;  /* WhatsApp darker green */
    transform: translateY(-2px);
    color: var(--white);
}

.btn-package i {
    font-size: 1.2em;
}

.btn-cta {
    background-color: var(--secondary);
    color: var(--white);
    padding: 15px 35px;
    font-size: var(--fs-sm);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
}

.btn-cta:hover {
    background-color: var(--secondary-dark);
    box-shadow: var(--shadow-lg);
    transform: translateY(-3px);
    color: var(--white);
}

.btn-submit, .btn-whatsapp {
    background-color: #25D366;  /* WhatsApp green */
    color: var(--white);
    padding: 12px 30px;
    width: 100%;
    font-size: var(--fs-sm);
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    border-radius: var(--border-radius-md);
    text-decoration: none;
    font-weight: 600;
    transition: all var(--transition-fast);
    border: none;
    cursor: pointer;
}

.btn-submit:hover, .btn-whatsapp:hover {
    background-color: #128C7E;  /* WhatsApp darker green */
    color: var(--white);
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.btn-submit i, .btn-whatsapp i {
    font-size: 1.4em;
}

.whatsapp-description {
    margin-bottom: var(--spacing-md);
    color: var(--medium);
    text-align: center;
}

.whatsapp-connect {
    margin-bottom: var(--spacing-md);
}

.whatsapp-benefits {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.benefit-item {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--medium);
    font-size: var(--fs-xs);
}

.benefit-item i {
    color: #25D366;
    font-size: 1.1em;
}

/* Header Styles */
#header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: var(--white);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    padding: 15px 0;
    transition: all var(--transition-fast);
}

#header.sticky {
    padding: 10px 0;
    box-shadow: var(--shadow-md);
}

#header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo h1 {
    font-size: 1.8rem;
    margin-bottom: 0;
    color: var(--primary);
}

.logo p {
    font-size: var(--fs-xxs);
    margin-bottom: 0;
    color: var(--medium);
}

#navbar ul {
    display: flex;
}

#navbar ul li {
    margin-left: var(--spacing-md);
}

#navbar ul li a {
    font-family: var(--font-heading);
    font-weight: 500;
    font-size: var(--fs-xs);
    color: var(--dark);
    padding: 5px 0;
    position: relative;
}

#navbar ul li a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary);
    transition: width var(--transition-fast);
}

#navbar ul li a:hover, 
#navbar ul li a.active {
    color: var(--primary);
}

#navbar ul li a:hover::after, 
#navbar ul li a.active::after {
    width: 100%;
}

.hamburger {
    display: none;
    cursor: pointer;
}

.bar {
    display: block;
    width: 25px;
    height: 3px;
    margin: 5px auto;
    transition: all var(--transition-fast);
    background-color: var(--dark);
    border-radius: 3px;
}

/* Hero Section */
#hero {
    background: linear-gradient(rgba(58, 86, 228, 0.9), rgba(58, 86, 228, 0.8)), url('https://source.unsplash.com/random/1920x1080/?classroom') no-repeat center center/cover;
    height: 100vh;
    color: var(--white);
    display: flex;
    align-items: center;
    text-align: center;
    position: relative;
    margin-top: 0;
    padding-top: 0;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

.hero-content h2 {
    font-size: 3.5rem;
    margin-bottom: var(--spacing-md);
    color: var(--white);
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.hero-content p {
    font-size: var(--fs-md);
    margin-bottom: var(--spacing-lg);
    color: var(--light);
}

.hero-buttons {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
}

/* Features Section */
#features {
    background-color: var(--light);
    padding-top: var(--spacing-lg);
    padding-bottom: var(--spacing-lg);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
}

.feature-card {
    background-color: var(--white);
    padding: var(--spacing-md);
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-md);
    text-align: center;
    transition: all var(--transition-fast);
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.feature-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto var(--spacing-sm);
    background-color: var(--primary-light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.feature-icon i {
    font-size: 2rem;
    color: var(--white);
}

.feature-card h3 {
    margin-bottom: var(--spacing-xs);
    color: var(--dark);
}

.feature-card p {
    color: var(--medium);
    font-size: var(--fs-xs);
}

/* Courses Section */
#courses {
    background-color: var(--white);
}

.courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.course-card {
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-fast);
    background-color: var(--white);
    border: 1px solid var(--light);
    padding: var(--spacing-md);
}

.course-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.course-icon {
    width: 60px;
    height: 60px;
    margin-bottom: var(--spacing-sm);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.course-card#physics .course-icon {
    background-color: var(--physics);
}

.course-card#chemistry .course-icon {
    background-color: var(--chemistry);
}

.course-card#mathematics .course-icon {
    background-color: var(--mathematics);
}

.course-card#biology .course-icon {
    background-color: var(--biology);
}

.course-icon i {
    font-size: 1.8rem;
    color: var(--white);
}

.course-card h3 {
    margin-bottom: var(--spacing-xs);
    color: var(--dark);
}

.course-card p {
    color: var(--medium);
    margin-bottom: var(--spacing-sm);
}

.course-card ul {
    margin-bottom: var(--spacing-md);
}

.course-card ul li {
    margin-bottom: var(--spacing-xs);
    font-size: var(--fs-xs);
    color: var(--medium);
    position: relative;
    padding-left: 1.5rem;
}

.course-card ul li::before {
    content: '\f00c';
    font-family: 'Font Awesome 5 Free';
    font-weight: 900;
    position: absolute;
    left: 0;
    color: var(--primary);
}

.course-price {
    margin-bottom: var(--spacing-sm);
    font-size: var(--fs-xs);
    color: var(--medium);
}

.course-price span {
    font-size: var(--fs-md);
    font-weight: 700;
    color: var(--primary);
}

.course-packages {
    background-color: var(--light);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    margin-top: var(--spacing-lg);
}

.package-header {
    text-align: center;
    margin-bottom: var(--spacing-md);
}

.packages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
}

.package-card {
    background-color: var(--white);
    padding: var(--spacing-md);
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-sm);
    text-align: center;
    transition: all var(--transition-fast);
}

.package-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.package-card h4 {
    color: var(--dark);
    margin-bottom: var(--spacing-sm);
}

.package-card p {
    color: var(--medium);
    font-size: var(--fs-xs);
    margin-bottom: var(--spacing-md);
}

/* About Section */
#about {
    background-color: var(--white);
}

.banner-container {
    margin-bottom: var(--spacing-lg);
    text-align: center;
    overflow: hidden;
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-md);
}

.banner-image {
    width: 100%;
    max-width: 100%;
    height: auto;
    display: block;
}

.about-content {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-lg);
}

.about-text {
    flex: 1;
    min-width: 300px;
}

.about-text h3 {
    color: var(--dark);
    margin-top: var(--spacing-md);
    margin-bottom: var(--spacing-xs);
}

.about-text p {
    color: var(--medium);
    margin-bottom: var(--spacing-sm);
}

.about-text ul {
    margin-top: var(--spacing-sm);
}

.about-text ul li {
    margin-bottom: var(--spacing-xs);
    display: flex;
    align-items: center;
    color: var(--medium);
}

.about-text ul li i {
    color: var(--secondary);
    margin-right: var(--spacing-xs);
}

.about-stats {
    flex: 1;
    min-width: 300px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: var(--spacing-md);
}

.stat-item {
    background-color: var(--light);
    padding: var(--spacing-md);
    border-radius: var(--border-radius-md);
    text-align: center;
    display: flex;
    flex-direction: column;
    justify-content: center;
    transition: all var(--transition-fast);
}

.stat-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
    background-color: var(--primary);
}

.stat-item:hover .stat-number,
.stat-item:hover .stat-text {
    color: var(--white);
}

.stat-number {
    font-size: var(--fs-lg);
    font-weight: 700;
    color: var(--primary);
    margin-bottom: var(--spacing-xs);
    transition: all var(--transition-fast);
}

.stat-text {
    font-size: var(--fs-xs);
    color: var(--medium);
    transition: all var(--transition-fast);
}

/* Testimonial Section */
#testimonials {
    background-color: var(--light);
}

.testimonial-slider {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
    overflow: hidden;
    height: 300px;
}

.testimonial-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transform: translateX(50px);
    transition: all var(--transition-medium);
}

.testimonial-slide.active {
    opacity: 1;
    transform: translateX(0);
}

.testimonial-content {
    background-color: var(--white);
    padding: var(--spacing-md);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    height: 100%;
    display: flex;
    flex-direction: column;
}

.quote-icon {
    margin-bottom: var(--spacing-sm);
}

.quote-icon i {
    font-size: 2rem;
    color: var(--primary-light);
}

.testimonial-text {
    font-size: var(--fs-sm);
    color: var(--dark-medium);
    margin-bottom: var(--spacing-md);
    flex-grow: 1;
}

.testimonial-author {
    margin-top: auto;
}

.testimonial-author h4 {
    color: var(--dark);
    margin-bottom: 5px;
}

.testimonial-author p {
    color: var(--primary);
    font-size: var(--fs-xs);
    margin-bottom: 0;
}

.testimonial-controls {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-top: var(--spacing-md);
}

.testimonial-prev,
.testimonial-next {
    background-color: var(--white);
    border: none;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    box-shadow: var(--shadow-sm);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.testimonial-prev:hover,
.testimonial-next:hover {
    background-color: var(--primary);
    color: var(--white);
}

.testimonial-dots {
    display: flex;
    margin: 0 var(--spacing-sm);
}

.dot {
    width: 10px;
    height: 10px;
    background-color: var(--light-medium);
    border-radius: 50%;
    margin: 0 5px;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.dot.active {
    background-color: var(--primary);
    transform: scale(1.3);
}

/* Contact Section */
#contact {
    background-color: var(--white);
}

.contact-content {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-lg);
}

.contact-info {
    flex: 1;
    min-width: 300px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--spacing-md);
}

.contact-card {
    padding: var(--spacing-md);
    background-color: var(--light);
    border-radius: var(--border-radius-md);
    transition: all var(--transition-fast);
}

.contact-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.contact-icon {
    width: 50px;
    height: 50px;
    margin-bottom: var(--spacing-sm);
    background-color: var(--primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.contact-icon i {
    font-size: 1.5rem;
    color: var(--white);
}

.contact-card h3 {
    font-size: var(--fs-sm);
    margin-bottom: var(--spacing-xs);
}

.contact-card p, .contact-card a {
    font-size: var(--fs-xs);
    color: var(--medium);
}

.contact-form {
    flex: 1;
    min-width: 300px;
    background-color: var(--light);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
}

.contact-form h3 {
    margin-bottom: var(--spacing-md);
    text-align: center;
}

.form-group {
    margin-bottom: var(--spacing-sm);
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
    color: var(--dark-medium);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--light-medium);
    border-radius: var(--border-radius-sm);
    background-color: var(--white);
    font-family: var(--font-body);
    font-size: var(--fs-xs);
    color: var(--dark);
    transition: all var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(58, 86, 228, 0.1);
}

#form-message {
    margin-top: var(--spacing-sm);
    padding: var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    font-size: var(--fs-xs);
    text-align: center;
}

#form-message.success {
    background-color: rgba(34, 197, 94, 0.1);
    color: #16a34a;
    border: 1px solid rgba(34, 197, 94, 0.3);
}

#form-message.error {
    background-color: rgba(239, 68, 68, 0.1);
    color: #dc2626;
    border: 1px solid rgba(239, 68, 68, 0.3);
}

.hidden {
    display: none;
}

/* Map Section */
#map {
    padding-top: 0;
}

.map-container {
    width: 100%;
    height: 450px;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

/* CTA Section */
#cta {
    background: linear-gradient(rgba(58, 86, 228, 0.9), rgba(58, 86, 228, 0.8)), url('https://source.unsplash.com/random/1920x1080/?students') no-repeat center center/cover;
    padding: var(--spacing-xl) 0;
    text-align: center;
    color: var(--white);
}

.cta-content {
    max-width: 700px;
    margin: 0 auto;
}

.cta-content h2 {
    font-size: var(--fs-lg);
    margin-bottom: var(--spacing-sm);
    color: var(--white);
}

.cta-content p {
    font-size: var(--fs-sm);
    margin-bottom: var(--spacing-md);
    color: var(--light);
}

/* Footer */
#footer {
    background-color: var(--dark);
    color: var(--light);
    padding: var(--spacing-xl) 0 var(--spacing-sm);
}

.footer-content {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.footer-logo, .footer-links, .footer-courses, .footer-contact {
    flex: 1;
    min-width: 200px;
}

.footer-logo h3 {
    color: var(--white);
    margin-bottom: 5px;
}

.footer-logo p {
    color: var(--light-medium);
    font-size: var(--fs-xs);
}

.footer-links h4, .footer-courses h4, .footer-contact h4 {
    color: var(--white);
    margin-bottom: var(--spacing-sm);
    font-size: var(--fs-sm);
}

.footer-links ul li, .footer-courses ul li {
    margin-bottom: 10px;
}

.footer-links ul li a, .footer-courses ul li a {
    color: var(--light-medium);
    font-size: var(--fs-xs);
    transition: all var(--transition-fast);
}

.footer-links ul li a:hover, .footer-courses ul li a:hover {
    color: var(--white);
    padding-left: 5px;
}

.footer-contact ul li {
    display: flex;
    margin-bottom: 15px;
    font-size: var(--fs-xs);
    color: var(--light-medium);
}

.footer-contact ul li i {
    margin-right: 10px;
    color: var(--primary);
}

.footer-contact ul li a {
    color: var(--light-medium);
}

.footer-contact ul li a:hover {
    color: var(--white);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.footer-bottom p {
    font-size: var(--fs-xxs);
    color: var(--light-medium);
    margin-bottom: 0;
}

.social-links {
    display: flex;
    gap: 15px;
}

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: var(--white);
    transition: all var(--transition-fast);
}

.social-links a:hover {
    background-color: var(--primary);
    transform: translateY(-3px);
}

/* Back to Top Button */
#back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background-color: var(--primary);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    box-shadow: var(--shadow-md);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition-fast);
    z-index: 999;
}

#back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

#back-to-top:hover {
    background-color: var(--primary-dark);
    transform: translateY(-5px);
}

/* Responsive Styles */
@media screen and (max-width: 1024px) {
    :root {
        --fs-xl: 2.5rem;
        --fs-lg: 2rem;
        --fs-md: 1.5rem;
    }
    
    #hero {
        height: auto;
        min-height: 100vh;
        padding-top: 100px;
    }
    
    .hero-content h2 {
        font-size: 2.8rem;
    }
}

@media screen and (max-width: 768px) {
    :root {
        --fs-xl: 2.2rem;
        --fs-lg: 1.8rem;
        --fs-md: 1.3rem;
    }
    
    #navbar ul {
        position: fixed;
        top: -100%;
        left: 0;
        width: 100%;
        flex-direction: column;
        background-color: var(--white);
        box-shadow: var(--shadow-md);
        padding: var(--spacing-md) 0;
        text-align: center;
        transition: top var(--transition-medium);
        z-index: 999;
    }
    
    #navbar.active ul {
        top: 70px;
    }
    
    #navbar ul li {
        margin: 10px 0;
    }
    
    .hamburger {
        display: block;
    }
    
    .hamburger.active .bar:nth-child(2) {
        opacity: 0;
    }
    
    .hamburger.active .bar:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }
    
    .hamburger.active .bar:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }
    
    .hero-content h2 {
        font-size: 2.3rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .hero-buttons .btn-primary, 
    .hero-buttons .btn-secondary {
        width: 100%;
    }
    
    .testimonial-slider {
        height: 350px;
    }
}

@media screen and (max-width: 576px) {
    :root {
        --fs-xl: 2rem;
        --fs-lg: 1.6rem;
        --fs-md: 1.2rem;
        --fs-sm: 1.1rem;
    }
    
    section {
        padding: var(--spacing-lg) 0;
    }
    
    .hero-content h2 {
        font-size: 2rem;
    }
    
    .hero-content p {
        font-size: var(--fs-sm);
    }
    
    .course-packages {
        padding: var(--spacing-md);
    }
    
    .contact-form {
        padding: var(--spacing-md);
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
    
    .social-links {
        margin-top: var(--spacing-xs);
        justify-content: center;
    }
    
    #back-to-top {
        bottom: 20px;
        right: 20px;
        width: 40px;
        height: 40px;
    }
}